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how to control the speed of DC motor by using 89c52

sir, i want to interfaceto 89c52 and control the speed of the dc motor,
i m not getting idea, how to control dc motor speed by using 89c52

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  • OK, time for a fresh start...

    More details are required, let's start with:

    - Details of the DC motor.
    - How the motor is to be driven.
    - How the motor speed is monitored.

    There are endless variations in each case.

    If you have not made up your mind about these details, then tell us about the application.